2026 Audit Report

Runway Gen-4 vs Spline AI v2

Is Runway Gen-4 worth the premium? Our automated audit reveals a 73% cost difference in production environments.

Last updated: Oct 23, 2026Sources: AxiomGrid Model Wiki · Provider pricing pagesQuality: MEDIUM

Axiom Verdict

"Major efficiency gain. Switching from Runway Gen-4 to Spline AI v2 cuts costs by half (73%). Recommended for high-volume batch processing."

Key Metrics

Axiom Snapshot
MetricRunway Gen-4Spline AI v2
Input / 1M¥324.00¥86.40
Output / 1M¥0.00¥0.00
Cache Read--
Context WindowN/AN/A
Max Output1 MinWeb
MultimodalYesYes
LatencyTBDTBD
Best FitAdsWeb Design

Action Plan

  • Migrate high-volume workloads to Spline AI v2 for immediate cost relief.
  • Keep Runway Gen-4 only for edge-case arbitration and premium reasoning.
  • Set a weekly cost audit to prevent pricing drift.

Methodology

  • Pricing is normalized to cost per 1M input/output tokens for direct comparison.
  • Arbitrage gap compares current input pricing against the higher-priced model.
  • Quality tier reflects pricing completeness, context window, and use-case coverage.

Pricing Matrix

MetricRunway Gen-4Spline AI v2
Input / 1M¥324.00¥86.40
Output / 1M¥0.00¥0.00
Cache Read¥0.00¥0.00

Use Case Analysis

Runway Gen-4 Wins
  • Ads
Spline AI v2 Wins
  • Web Design

FAQ

Which model is cheaper: Runway Gen-4 or Spline AI v2?
Spline AI v2 shows a 73% cost advantage based on current input pricing.
When should I choose Runway Gen-4?
Runway Gen-4 is best for Ads.
How does the context window compare?
Runway Gen-4 supports N/A context vs Spline AI v2 at N/A.
Which model is better for high-volume routing?
Spline AI v2 is the recommended L1/L2 router for cost efficiency.
Do cache discounts materially change costs?
Cache pricing is not published for at least one model; treat cache savings as unknown.
How often is this comparison updated?
This audit refreshes as model pricing changes. Last updated Oct 23, 2026.

Performance Radar

Runway Gen-4
Spline AI v2

Cost Scaling (Monthly)

Runway Gen-4 vs Spline AI v2: 2026 Cost Audit | AxiomGrid